Pressure-regulating valve.



I'. L. JAHN.

PRESSURE RBGULATING VALVE.

APPLIUATIQI FILED snrT.a,1noa.

91 7,443 Patented Apr. 6, 1909.

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F. L. JAHN. museum BBGULATING VALVE. A?P IOATION IILED EBPT. 8,1903., 917,443 Patented Apr. 6, 1909. 2 SHEETS-SHEET wl 4MM www? J meg/f 4 UITED sirnfrns Peres 'r onirica.

FREDERICKLLJANHN, OF EHLLADELPHM, PENNSYLVANIA, ASSLGNOR TO THE WATSON AND MCDANIEL COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OAF ENNSYLVANIA- PRESSURE-REGULATING VALVE.

Specification of Lettere Patent.

Patented April 6, 1909.

Application led September 8, 190B. Serial No. 452,087.

,To all whom it may yconcern:

Be it Aknown that l, F-REDERicK L. JAHN, a citizen of the United" States, residing at Philadelphia, in the county of Philadelphia and4 State of Pennsylvania, have invented 'new-and useful Improvements in Pressure- Regulating Valves, of which the followingis ciication.

l invention relates Vtoliluid pressure rcgulatihg"valves, and wherein are intro ducedoertam improvements whereb)r the friction of the moving parts is reduced to n `minimum .by the u se of metal diaphragms 'and compounding levers carried on rollers, and the 'elimination of all pistons` which oneate friction; wherein the fluid pressure i flows the same direction as theniain valve moves; and in which the arrangement of the parts permits their removal from the case without breaking pipev .connections The construction herein set forth insures a very sensitive action, and a uniform predetermined pressure upon the delivery side regardless of the fluctuations upon the initial side, and also insures a restricted flow upon the delivery side when the demand for pressure is decreased. The means by which these oplerations are accomplished will be more u y set forth in the specification, and illustrated in the drawings forming u part of 'f this ap lication., There is also a modified form o rvalve Ihaving a controlling inlet Q from a source of pressure supply wholly independent of the pressure passing through the valve.

The drawings comprise Figure 1, a vertical central section of a small size valve. Fig. 2, a. View of the top of the compounding levers. ig, a vertical central section of a inodiform having an Vindependent pressure inlet.

In all the drawings similar parts bear the same characters of reference.

A easel has an .inlet 2 and an outlet 3, between winch is a partition 4 having a rel movable andrenewable seat 5 `f or the main /valve 6 placed 1n a chamber 7 having a rcmovable cover 8 through which the upper stem 9 of the valve 6 1s passed, leaving a slightspace 10 around the stem for Huid passage. A'spring' 11 is seated between cover 8 and valve 6 to hold .the valve closed when not ippuse. A head 12 is secured to stem 9 and 1s coupled by a pin 13 to a bifurcated bentlever 114, which at its oppositev end can I ries a roller 15 on a pin 16; about midway of lever 14 there is attached n second beni lever 17 by. a pin 18, having a roller 19 et its outer end on a )in 20, lever 17 being at the center line of t e valve connected by u in 2]. to a plate 22 secured to the main inclu lic diaphragm 23. Thel compound lever action is the saine as in the Chapman patent 656,594 of June 6, 1899 (owned by appli cants assignees) but of an improved construction w lich eliminates the friction at the seated ende of the former construction, by introducing free moving rollers, while ermitting the same decreased movement o the diaphragm relativo to the greater movement of the mainvalve.

Rollers 15, 19 rest upon 'a seat 24 encircling case 1, und are secured by' a ring 25 under diaphragm 23, the diaphragm being secured blv a cover 26. At one side of case 1 theie c high pressure passage 27 from inlet 2 into cover 26, and therefrom a restricted passage 28 into the hi fh pressure chamber 29 uhder cover 26 unil over diaphragm 223. Cover 26 has an upward extension 3U forming a low pressure chamber 31 wherein is a seat 32 opening into chamber 29, and containing a controller valve 33 guided l, in u ucr-.l 34 extending upward `from seat 32 l with s. washer 35 und u. nut 36 controlling a i spring` 37 normally holding vulve 33 closed. An annular passage 3S around the upward i los` pressure chamber 31 by an ope-ning 39, i there is also a low pressure assage 4U from chamber 31 -to outlet 3. iounted above 1 chamber 31 there is a low pressure metallic dinpln'ngni41 secured by a casing 42, wherel in is u round faced spring seat 43 carryin; a spring; 44 Jwith an upper seat 45 control ed by a screw 46 having a check nut 4'?, the spring 44 being set by screw 46 to`deter1nine l tie pressure -to be delivered from the pres` sure outlet, and a cover 48 incloses screw 46. i Main valve 6 is guidedY at its lower end by its `i stom 49 'in nut 50.

ln Fig. 3 the arrangement of the parts is the same ns in Fig. V1,-eirccpt that chamber 31 is i closed by a screw threaded to i 57 leaving u, g space 58 between it and diaphragm. 4l into l which space there isa passage 59 60 from without the chamber. In the constructions presented, the pistoususual in valves heretofore em 4loyed forfthe same purpose, have been entire y'folitted, 'as their use entails lealragcs extension of valve 33 is connected to the if fitted for free movement, or needless friction if closely litted'or provided with packing rings. The combinations o! compound 1evers whereby metallic diaphragme can be effectively operated at a minimum amount ol' deflection with a greater valve movement is a ver desirable improvement which insures long ife for the da hragm, and the rollers for the levers nony lirst introduced reduces the friction, making the valve more sensitive. The lo`w of steam, or the fluid, in the direction of valve movement is also a distinct advantage. The easy rempval of the operatively connected part pipe joints, and the employment of a main va ve with a single removable and renewable seat which can always be made ti ht, rather than a double seated balanced va ve of two equal diameters, which are rarely tight or can be ground true, are features which go to make a perfect construction.

The o eration of the 4mechanism is as follows. I igh pressure is admitted at inlet 2 and flows into passage 27 and in a less degree through the restricted passage28` into high pressure chamber 29, as the pressure increases the diaphragm will be deflected downward, and on account of i ts greater area than that of valve 6 it will have an excess f ressure over and above that against the val)ve, and this excess of pressure will close .the valve. Then in order to regulate the amount of required low pressure, or the pressure to be dehvered from outlet 3, the screw 46 is turned to force spring 44 against the low pressure diaphragm 4l to resist and regulate the desired amount of low ressure. As thc diaphragm 41 is forced own it contacts with nut 36 and this closes spring 37, opens controller valve 33 and permits the high pressure in chamber 29 to escape much faster than it llows in throu h the restricted passage 28; the pressure a ove the diaphragm 23 now being less than the pressure against valve 6 the valve will be opened and a reduced pressurerwill flow to outlet 3, through space l0 t0 the underside of the diaphragm 23, and` through passage 4U into chamber 3l and against the low pressure diaphragm 41. As long as the delivered low pressure is uniform diaphragm 41 and controller valve 33 will remain inactive, but should there be an excess of low pressure it will back up and force diaphragm 41, close controller valve 33 and permit hi h pressure to accumulate in chamer 29, c ose down valve 6 and restrictthe flow and the consequent volume of pressure permitted to ilow to outlet 3. A slight movement of controller valve 33 is sufficient to instantly regulate the flow past valve 6. The action of the controller valve 33 is due wholly to an excess or diminution of low pressure upon diaphragm 41, and its sensitive action insures a uniform action of the valve in delivering a uniform pressure from l without breaking l the low ressure side regardless oi tluctuations in 'gh ressure or increased or decreased deman for low pressure.

I claimmetallic diaphragm above thc low pressure chamber; a passage between the chambers, and a valve therein opened by the low pressure diaphragm, and resilient means for its closi 2. ni a pressure regulating valve, a high pressure inlet thereto and a su re outlet therefrom, a valve seated against the high pressure; a metallic diaphragm, a high pressure chamber above the iaphr and in communication with the inlet to t o casing; a system of compound levers oona casing,

by which the diaphragm movement is less than the valvemovement, rollers pivotally mounted at the ends of the levers, and s circular seat Whereon the rollers are placed; a low pressure chamber in communication with the outlet to the casing; a diaphragm mounted above the low pressure chamber' a controller valve, and a passage between t e chambers aforesaid intercepted by said valve; resilient means to close the valve, and resilient means mounted above the low pressure diaphragm to Adepress it open the valve, and permit t e pressure in t e high ressure chamber to flow to the low pressure c amber.

3. Ina ressure regulator, a case, a hi h pressure in et thereto, a low pressure out et therefrom, a valve controlling the flow from the high ressure inlet to the low pressure outlet andi opened by the high pressure; a removable seat for the valve; a resilient means to normally seat the valve; aV lower stem and a lower guide for the valve; an upper stem and an upper guide for the valve; a uid pressure passage around the upper stem and a metallic iaphragm above the upper stein; a bent lever connected to the stem and having a pivotal roller at its opposite end, a second bent lever attached to the lirst lever about midway, and its outer end having a pivotal roller a circular seat for the rollers, said rollers and levers permitting the diaphragm to move a less degree than the pressure chamber; a vresiliently depressedv nected to the diaphragm and the valve andl low presl valve; a high pressure chamber `above the p ,ldiaphragin and passages from the high pressure inlet thereto, one of said passa sing restricted; a low pressure cham er with a connection to the low pressure outlet,

ist

upon an accumulation of excessive pressure.

in the high pressure chamber, and to permit 1t to elo'se upon an accumulation of har-.li or lo lOW'preSSure in the low pressure ehaln ber.

4. In a pressure regulator, a ease having van inlet thereto and au outlet therefrom, a valve lntereeptmg the passage between the inlet and the outlet and opened bythe pres- ,.3 sure from the inlet, a renewable seat therefor,

an upper and a lower guide therefor, and

resilient means for its closure; a metallici 'diaphiagm and compound lever eonnectlons therefrom to the valve, with votal 4roller ;4 1| supports; a high pressure cham )er above the diaphragm and connections therefrom to the inlet; a ow pressure chamber/with connections to the outlet and to the high iressure chamber; a. controller valve in the high ressure connection with resilient means for lts elosure, a removable to i for the ehamber and through whieh the vaive extends and is guided; a low pressure diaphragm above the valve extension and in eontaet therewith, and resilient means i'or its adjustment; and an inlet between the chamber lo) and the low i'nessure diaphragm for the a( mission of pressure other than that passing through the valve. Y

[n testimony whereof I aiix my signature in presence of two witnesses.

FREDERICK I i. J AHN Witnesses:

R. C. Wmen'r, WILLIAM C. STOEVEP..

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